CN217761424U

CN217761424U - Centrifugal gas blower gas seal device

Info

Publication number: CN217761424U
Application number: CN202221863941.4U
Authority: CN
Inventors: 杨立志
Original assignee: Shanxi Huaxin Coal Coking Industry Group Co ltd
Current assignee: Shanxi Huaxin Coal Coking Industry Group Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-08
Anticipated expiration: 2032-07-19

Abstract

The utility model discloses a centrifugal gas blower air seal device, which comprises a sealing shaft sleeve and a bearing seat sleeved on the outer circumference of the sealing shaft sleeve; the bearing seats are a plurality of bearing seats which are sequentially arranged along the axial direction of the sealing shaft sleeve; the sealing shaft sleeve comprises a plurality of sealing parts respectively corresponding to the bearing seats, the outer circumference of each sealing part is provided with a plurality of sealing grooves, and the inner circumference of each bearing seat is provided with a plurality of sealing teeth; the plurality of sealing teeth comprise a plurality of high sealing teeth and a plurality of low sealing teeth which are alternately arranged, and in an assembling state, the low sealing teeth correspond to the positions on two sides of the sealing groove, and the high sealing teeth correspond to the sealing groove. The utility model discloses a set up the multistage sealed form of arranging with the sealed tooth of adoption height, increased the tight degree of sealing of atmoseal, can increase the gas leakage resistance, guarantee that gas pressure reduces step by step, cause coal gas no longer to leak, guarantee the sealed operation of coal gas air-blower, both can reach safety ring and protect's requirement, can avoid the poisoning incident emergence in the production process again.

Description

Centrifugal gas blower gas seal device

Technical Field

The utility model relates to a centrifugal coal gas air-blower field especially relates to a centrifugal coal gas air-blower atmoseal device.

Background

When a coal gas system of a coking plant operates, the safety and the reliability of a centrifugal coal gas blower in a coal gas device need to be ensured. However, the shaft seal of the gas blower is easy to generate gas leakage, and the CO concentration in a machine room area can exceed 1000ppm (the CO safety value is less than 17 ppm), which does not meet the requirements of environmental protection and safe production.

In the prior art, a labyrinth seal is often adopted for a gas blower shaft seal, particularly a high-pressure side shaft seal. The labyrinth seal is divided into an inner part and an outer part, when in assembly, the inner sealing piece and the outer sealing piece are arranged in the casing, and the sealing teeth are processed on the corresponding parts of the sealing pieces to form a labyrinth seal system. When the gas leakage-proof valve works, the gap between the dynamic sealing piece and the static sealing piece is increased, so that the resistance is increased to generate a throttling effect, the gas leakage is reduced, and when the pressure is reduced to be equal to the external pressure, the gas is not leaked any more. From the operation effect of many years, the shaft seal effect in the prior art is not ideal, and needs to be improved to ensure the safe operation of the gas blower.

In the prior art, the prior shaft seal is modified, nitrogen filling holes are added, and the leakage of the coal gas is prevented by using the pressure of the nitrogen. However, this method requires a nitrogen charging device to be added outside the blower, and the addition of the additional device makes the blower system more complicated, and also requires a larger space to be reserved in the plant, which significantly increases the cost.

In engineering practice, methods of modifying the shaft seal of the original blower and increasing the graphite carbon ring seal can also be adopted. However, due to the structural limitation of the blower, the carbon ring seal cannot be increased in many cases, and therefore, the blower cannot be widely used.

SUMMERY OF THE UTILITY MODEL

In view of the shortcomings of the prior art, the purpose of the utility model is to provide a centrifugal gas blower gas seal device at least, adopt multiple technical measure to improve current blower gas seal structure, realize the good sealing to the blower bearing, reach the purpose that the coal gas does not have the leakage or reveals less.

One proposal of the utility model is to provide a centrifugal gas blower air seal device, which comprises a sealing shaft sleeve and a bearing seat sleeved on the outer circumference of the sealing shaft sleeve; the bearing seats are a plurality of bearing seats which are sequentially arranged along the axial direction of the sealing shaft sleeve; the sealing shaft sleeve comprises a plurality of sealing parts respectively corresponding to the plurality of bearing seats, the outer wall of each sealing part is provided with a plurality of axially-arranged annular sealing grooves, and the inner wall of each bearing seat is provided with a plurality of axially-arranged annular sealing teeth; the sealing teeth comprise a plurality of high sealing teeth and a plurality of low sealing teeth which are alternately arranged, and in an assembling state, the low sealing teeth correspond to the positions on two sides of the sealing groove, and the high sealing teeth correspond to the sealing groove.

Optionally, the height of the high sealing teeth is more than twice the height of the low sealing teeth.

Optionally, the radial cross-sectional shape of the seal groove along the axial direction is an inverted trapezoid, and the radial cross-sectional shape of the high seal tooth along the axial direction is an inverted trapezoid.

Optionally, the radial cross-sectional shape of the sealing groove along the axial direction is an inverted trapezoid, and the radial cross-sectional shape of the high sealing tooth along the axial direction is an inverted triangle.

Optionally, the radial cross-sectional shape of the sealing groove along the axial direction is an inverted triangle, and the radial cross-sectional shape of the high sealing tooth along the axial direction is an inverted trapezoid.

Optionally, the radial cross-sectional shape of the sealing groove along the axial direction is an inverted triangle, and the radial cross-sectional shape of the high sealing tooth along the axial direction is an inverted triangle.

Optionally, the radial cross-sectional shape of the seal groove along the axial direction is a rectangle, and the radial cross-sectional shape of the high seal tooth along the axial direction is a rectangle.

Optionally, the number of the sealing grooves is 15-20.

Optionally, the sealing portion comprises two or three.

Optionally, the number of seal grooves of the relatively outer seal is less than the number of seal grooves of the relatively inner seal.

The utility model discloses following beneficial effect has:

the sealing tightness degree of the air seal is increased by arranging multi-stage sealing and adopting a high-low sealing tooth matching mode. Based on the structure form, the gas leakage resistance can be increased, the gas pressure is reduced step by step, the gas is prevented from leaking, the gas blower is guaranteed to operate in a sealing mode, the requirements for safety and environmental protection can be met, and the occurrence of poisoning safety accidents in the production process can be avoided.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a centrifugal gas blower gas seal device according to an embodiment of the present invention, in which a bearing seat is a sectional view.

Reference numerals:

the sealing device comprises a sealing shaft sleeve 1, a bearing seat 2, a sealing groove 3, a high sealing tooth 4 and a low sealing tooth 5.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 shows an embodiment of the centrifugal gas blower gas seal device of the present invention, which includes a seal sleeve 1, a plurality of bearing seats 2, a plurality of seal grooves 3, and a plurality of seal teeth.

The sealing shaft sleeve 1 is sleeved outside the driving shaft of the blower, and the plurality of bearing blocks 2 are axially arranged in sequence and sleeved outside the sealing shaft sleeve 1; the outer wall of the sealing shaft sleeve 1 is provided with a plurality of sealing parts corresponding to the plurality of bearing seats 2, each sealing part is provided with a plurality of axially arranged annular sealing grooves 3, and the inner wall of each bearing seat 2 is provided with a plurality of axially arranged annular sealing teeth; the sealing teeth are divided into high sealing teeth 4 and low sealing teeth 5, each bearing seat 2 is provided with a plurality of high sealing teeth 4 and a plurality of low sealing teeth 5, and the high sealing teeth 4 and the low sealing teeth 5 are alternately arranged. In an assembly state, the low sealing teeth 5 correspond to the positions of two sides of the sealing groove 3, and the high sealing teeth 4 correspond to the sealing groove 3 to form a labyrinth sealing structure.

The number of the sealing parts is preferably 2 or 3, the number of all sealing grooves is preferably 15 to 20, and the number of the sealing grooves of the outer sealing part can be smaller than that of the inner sealing part. For example, as shown in fig. 1, in the present embodiment, there are two seal portions, the number of seal grooves of the outer seal portion is 9, and the number of seal grooves of the inner seal portion is 10.

Preferably, the height of the high sealing teeth 4 is more than twice the height of the low sealing teeth 5.

In this embodiment, the radial cross-sectional shape of the seal groove 3 in the axial direction is a rectangle, and in other embodiments, the radial cross-sectional shape may be an inverted trapezoid or an inverted triangle, and accordingly, the radial cross-sectional shape of the high seal tooth 4 in the axial direction is an inverted trapezoid or an inverted triangle.

As can be seen from the above description, the utility model discloses a set up multistage sealed and adopt the form of the sealed tooth collocation of height, increased the sealed tight degree of atmoseal. Based on the structure form, the gas leakage resistance can be increased, the gas pressure is reduced step by step, the gas is prevented from leaking, the gas blower is guaranteed to operate in a sealing mode, the requirements for safety and environmental protection can be met, and the occurrence of poisoning safety accidents in the production process can be avoided.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A centrifugal gas blower gas seal device comprises a seal shaft sleeve and a bearing seat sleeved on the outer circumference of the seal shaft sleeve; the method is characterized in that:

the bearing seats are a plurality of bearing seats which are sequentially arranged along the axial direction of the sealing shaft sleeve; the sealing shaft sleeve comprises a plurality of sealing parts respectively corresponding to the plurality of bearing seats, the outer wall of each sealing part is provided with a plurality of axially-arranged annular sealing grooves, and the inner wall of each bearing seat is provided with a plurality of axially-arranged annular sealing teeth; the sealing teeth comprise a plurality of high sealing teeth and a plurality of low sealing teeth which are alternately arranged, and in an assembling state, the low sealing teeth correspond to the positions on two sides of the sealing groove, and the high sealing teeth correspond to the sealing groove.

2. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the height of the high sealing teeth is more than twice of the height of the low sealing teeth.

3. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the radial cross-sectional shape of seal groove along axial is for falling trapezoidal, high seal tooth is for falling trapezoidal along axial radial cross-sectional shape.

4. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the radial cross-sectional shape of seal groove along axial is inverted trapezoid, high seal tooth is for falling triangle-shaped along axial radial cross-sectional shape.

5. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the radial cross-sectional shape of seal groove along axial is inverted triangle, high seal tooth is for falling trapezoidal along axial radial cross-sectional shape.

6. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the radial cross-sectional shape of seal groove along axial is inverted triangle, high seal tooth is inverted triangle along axial radial cross-sectional shape.

7. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the radial cross-sectional shape of seal groove along axial is the rectangle, high seal tooth is along axial radial cross-sectional shape for the rectangle.

8. A centrifugal gas blower gas seal apparatus as claimed in claim 1, wherein: the number of the sealing grooves is 15-20.

9. A centrifugal gas blower gas seal apparatus as claimed in claim 1 or 8, wherein: the sealing portions include two or three.

10. A centrifugal gas blower gas seal apparatus as claimed in claim 9, wherein: the number of sealing grooves of the sealing part located on the relatively outer side is smaller than the number of sealing grooves of the sealing part located on the relatively inner side.